Cases where adults who were born blind and have surgery to restore sight have provided evidence that:
self-locomotion, even without visual input, is sufficient for perfect development of the ability to mentally represent space.
the stream of visual information that accompanies self-locomotion is important for an individual's current sense of space only.
early visual experience is important for full development of the ability to mentally represent space.
individuals who are blind are better able to mentally represent space than those with normal vision.